Characteristic polynomial
$$\begin{equation}\left(\lambda + 2\right)^{2} \left(\lambda + 6\right) \left(\lambda^{2} + 3 \lambda + 9\right) \left(\lambda^{2} + 4 \lambda + 8\right) \left(\lambda^{6} - 12 \lambda^{5} + 16 \lambda^{4} + 192 \lambda^{3} - 1328 \lambda^{2} + 3264 \lambda - 19072\right)\notag\end{equation}$$
Minimal polynomial
$$\begin{equation}\left(\lambda + 2\right) \left(\lambda + 6\right) \left(\lambda^{2} + 3 \lambda + 9\right) \left(\lambda^{2} + 4 \lambda + 8\right) \left(\lambda^{6} - 12 \lambda^{5} + 16 \lambda^{4} + 192 \lambda^{3} - 1328 \lambda^{2} + 3264 \lambda - 19072\right)\notag\end{equation}$$
Quantum multiplication matrix
$$\begin{equation}\begin{pmatrix}0 & 0 & 4 & 8 & 0 & 0 & 0 & 12 & 6 & 8 & 8 & 8 & 10 \\ 2 & 0 & 0 & 0 & 4 & 8 & -2 & 4 & 2 & 12 & 0 & 0 & 0 \\ 1 & 0 & -1 & 2 & 0 & 0 & 2 & 4 & 2 & 0 & -3 & 0 & 0 \\ 1 & 0 & 1 & 0 & 0 & 0 & 0 & 4 & 2 & 0 & 3 & 0 & 4 \\ 0 & 1 & 3 & 0 & -1 & 2 & 0 & 2 & 1 & 4 & 0 & 0 & 0 \\ 0 & 1 & 0 & 2 & 1 & 0 & 0 & 0 & 0 & 4 & 0 & -2 & 0 \\ 0 & 2 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 4 & 4 & 8 & 6 \\ 0 & 0 & 1 & 2 & 0 & 0 & 0 & 0 & 1 & 0 & 0 & 2 & 0 \\ 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & -2 & 0 & 0 & 0 & 0 \\ 0 & 0 & 0 & 0 & 1 & 2 & 0 & 4 & 2 & 0 & 0 & 0 & 0 \\ 0 & 0 & 0 & 0 & 3 & 0 & 1 & 0 & 0 & 2 & -1 & 2 & 2 \\ 0 & 0 & 0 & 0 & 0 & 2 & 1 & 0 & 0 & 0 & 1 & 0 & 2 \\ 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 8 & 2 & 4 & 0\end{pmatrix}\notag\end{equation}$$